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Finding the Fourth Proportional to 1,027.87, 1,539.51 and 479.23

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Solution

The fourth proportional to 1,027.87, 1,539.51 and 479.23 is: 717.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.87 : 1,539.51 = 479.23 : x
  2. Step 2: Convert to fraction form
    1,027.87/1,539.51 = 479.23/x
  3. Step 3: Cross multiply
    1,027.87x = 1,539.51 × 479.23
  4. Step 4: Simplify right side
    1,027.87x = 737,779.38
  5. Step 5: Solve for x
    x = 737,779.38/1,027.87
  6. Step 6: Final answer
    x = 717.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.